CHAPTER 16 RESET FUNCTION
Preliminary User’s Manual U16846EJ1V0UD
306
Figure 16-2. Timing of Reset by RESET Input
Delay
Delay
Hi-Z
Normal operation
CPU clock
Reset period
(Oscillation stop)
Operation stop
(17/f
R
)
Normal operation
(Reset processing, Ring-OSC clock)
RESET
Internal
reset signal
Port pin
(except P130)
High-speed
system clock
Ring-OSC clock
Port pin (P130)
Note
Note Set P130 to high-level output by software.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
effected, the output signal of P130 can be dummy-output as the reset signal to the CPU.
Figure 16-3. Timing of Reset Due to Watchdog Timer Overflow
Hi-Z
Normal operation
Reset period
(Oscillation stop)
CPU clock
Watchdog timer
overflow
Internal
reset signal
Port pin
(except P130)
Operation stop
(17/f
R
)
Normal operation
(Reset processing, Ring-OSC clock)
High-speed
system clock
Ring-OSC clock
Note
Port pin (P130)
Note Set P130 to high-level output by software.
Caution A watchdog timer internal reset resets the watchdog timer.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level immediately after
reset is effected, the output signal of P130 can be dummy-output as the reset signal to the CPU.